Stop-motion for warping-machines.



F. S. RAND.

STOP MOTION FOR WARPING MACHINES.

APPLICATION FILED MAR. 30, 1910.

- 1,025,1 58. Patentd Ma 7, 1912.

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F. S. RAND.

Patented May 7, 1912.

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STOP MOTION FOR WARPING MACHINES.

- APPLICATION FILED MAR. 30, 1910. 1,025, 1 58.

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STOP MOTION FOR WARPING MACHINES.

APPLI UATION FILED MAR. 30, 1910.

Patented May 7, 1912.

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OQZTAJ Aime/ irs F. S. RAND. STOP MOTION FOR WARPING MACHINES. APPLICATION IILIBD MAR. 30, 1910.

1,025,158. Patented May 7, 1912.

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UNITED STATES PATENT OFFICE.

FESTUS S. RAND, OF PROVIDENCE, RHODE ISLAND, A SSIGNOR TO UNIVERSAL WINDING COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.

STOP-MOTION FOB WARPING'r-MAGHINES.

Specification of Letters Patent.

Patented May '7 1912.

Application filed. March 30, 1910. Serial No. 552,425.

To all whom it may concern:

Be it known that I, FEsrUs S. RAND, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Stop- Motions for VVarpingMachines, of which the following is a specification.

My invention relates to Warping or beaming machines and consists of improvements in the stop-motion mechanism which controls the operation of the machine.

My invention relates particularly to the drop-wires and feeler mechanism which act to stop the machine when a thread breaks and consists of improvements in the form and arrangement of the same and in their method of operation in connection with the stopping devices.

The invention is fully set forth in the following description, illustrated by the accompanying drawings, in which 1-- Figure 1 is a front elevation of a portion of the warping machine showing the driving pulleys and belt shifting arrangement; Fig. 2, an end elevation showing the knockoff devices for the stopping mechanism; Fig. 3, an enlarged detail view of the same; Fig. 4, an enlarged detail view of the drop-wires and their correlated feeler mechanism; Fig.

5, a plan view of the feeler mechanism; Fig. 6, a plan view showing the arrangement of the drop-wires in relation to the threads of the Warp; Fig. 7, a perspective view showing the method of mounting the dropwires in units; Fig. 8, a perspective view showing the construction of the drop-wire.

Figs. 1 and 2 illustrate a usual form of warping or beaming machine adapted for winding yarns in multiple from a creel or other supply-holder on to a warpor section-beam. The machine consists essentially of two upright frames A at either end, carrying suitable bearings a in which the driving-shaft C is rotatably mounted, see Fig. 1. The shaft C carries 'a driving roll or drum D arranged between the two end frames of the machine and adapted to bear on the barrel of the beam B to rotate the latter by frictional contact with the yarn Wound thereon. The beam B consists of a cylindrical barrel Z2 having flanges b at either end and provided with trunnions b which rotate in bearings at the ends of two swinging arms 5 see Fig. 2. The arms 7) are hinged on a rod 6 extending between has been overcome.

the end frames of the machine, and weights 7), dependent from the ends of the arms, serve to keep the-beam in contact with the driving-drum D. The drum D is of a length to adapt it to fit between the heads on the beam so that it can contact with the barrel 5 and as the yarn on the barrel increases in diameter the beam rises up from the drum, supported on its hinged arms 6*, see Fig. 2. Preferably the shaft C is rotated through a system of driving pulleys c, c and a driven by a belt 09 and arranged to start the rotation of the drum at a relatively slow speed and then increase the speed after the inertia of the moving parts The pulley 0 is an idler on which the belt runs when the machine is inoperative and to start the rotation of the driving-shaft the pulley is shifted on to the second pulley 0 The pulley o is also free to rotate on the shaft C, but is connected therewith by a train of gearing through which its rotation is imparted to the shaft at a lesser speed. The speed regulating mechanism is not here shown in detail as it is not essential to the present invention. The pulley 0 is fast on the shaft C and after the machine has been started the belt on is shifted on to this pulley to drive the shaft directly at the maximum speed required.

For shifting the belt from one pulley to the'next, I have shown a usual form of beltshipper \V, pivoted on a standard Z secured to the floor, and operated through a bellcrank arm 10, see Fig. 1. The end of the arm to is forked at Q02, and engaging the opening in the fork is a pin 6 secured in the arm of a bracket 6' which is fastened to the foot-board e of a treadle E. The footboard 6 extends along the front of the machine and is supported at either end by arms 6 secured to a rockable rod F. The rod F is supported in bearings in the'end frames of the machine and extends through the left-hand frame adjacent a brake-wheel f secured to the shaft C. Secured to this end of the rod is an arm f, see Fig. 2, carrying a brake-shoe f at its outer extremity adapted to bear on the periphery of the brakewheel f An arm 9 is also secured to the rod F between the arms 6 of the treadle and carries a Weight G adjustable along its length to vary the operative force. The weight Gr acts to lift the treadle E, and, through the latters connection with the beltshipper W, the belt w is shifted from the fast pulley 0 back on to the idler pulley c. As the treadle E is raised by the weight G to shift the belt the brake-shoe f comes into contact with the brakewheel f to apply a friction to arrest the rotation of the driving-shaft C.

To start the rotation of the shaft C the treadle E is pressed downward by the operators foot and the belt is carried first on to the pulley c and then on to the pulley 0 as previously explained. The belt is kept on the pulley 0 during the preliminary slow starting of the machine by holding the foot on the treadle; but after the belt has been shifted to the pulley c it is required to retain it in this position during the continuous operation of the machine and to effect this, detent means are provided to hold the treadle in its lowermost position. As shown in Fig. 2, the means for locking the treadle E consists of a detent staff or rod H pivoted at- Zi on the arm 6* with its upper end extending through a guiding loop or staple h fastened to the frame'of the machine. The upper extremity of the rod H slides in the staple h when the treadle is moved and is formed with a detent shoulder h see Fig. 3, adapted to engage the under side of the staple. IVhen the treadle is carried down to its lowermost position gravity will cause the rod H to tilt over to the right to engage the detent shoulder 7L and prevent the treadle from rising under influence of its weight G.

The detent rod H is arranged to be released to allow the treadle to rise to efiect the shifting of the belt by a knock-otf device now described. Fast on the end of the driving-shaft C is a cam I formed with a camgroove Z on its inner face. A lever J is pivoted at j on the frame A and at its opposite end carries a stud or roll j engaging the cam-groove 2'. A link L connects the lever J with an arm K secured to a rocker-shaft M. During the operation of the machine the rocker-shaft M is operated continuously from the cam I through the medium of the link L.

My invention contemplates improved means for arresting the movement of the shaft M when a thread breaks, as hereinafter described. This arrestment of the operation of the rockershaft M acts on the knock-off mechanism to disengage the detent rod H and release the treadle E in the following described manner: The link L is made in two parts Z and Z connected inductively by an arrangement which allows it to be extended when the arm K is held from movement. The end of the lower member Z of the link engages an abutment Z on the upper member Z to give a positive connection for lifting the arm K, and at Z the member Z is formed with a beveled shoulder engaging a corresponding shoulder Z" on the member Z. The two members are spliced together by a yielding connection consisting of a stud Z extending from the member Z through. a slot Z in the member Z and carrying a coiled spring Z adapted to press the two members together, see Fig. Under normal stress the engagement of the beveled shoulders Z and Z gives a connection suiliciently strong to cause the link L to be reciprocated longitudinally as one piece. When, however, the rocker-shaft M is held from oscillating, and the arm K restrained thereby from downward movement, the shoulder Z will rise up on the bevel Z and the two parts of the link will separate, against the action of the spring Z, to allow the member Z to move downward without the member Z.

The link L is guided in its movement by a staple 00 on a bracket X fastened to the frame A, and pivoted on this bracket is a knock-off lever Q. The lever Q is formed with an upwardly extending arm (I having a projecting tail 9 adapted to engage the side of the detent rod H, and a toe g extends outward adjacent the link L. The member Z of the link L has a shoulder Z which normally reciprocates in a path just clear of the toe member Z is separated from the member Z the shoulder Z will be carried into position to engage the toe on the downward stroke of said member and, through such engagement, will rock the lever Q, to move the rod H and release its detent shoulder it from the staple h. \Vhen the detent rod H is released the treadle will move upward, under influence of its weight G, to shift the belt and arrest the operation of the machine.

My present improvement resides in the novel arrangement of drop-wires and feeler mechanism now described: Extending between the end frames of the machine are a plurality of horizontal rods S, S, etc, which support the drop-wires T, T in separate rows or banks so that a maximum number of the same may be used without crowding, see Figs. 1, 4t and G. The drop-wires T are preferably constructed in the novel form shown in Fig. 8 and assembled in units of a convenient number on hinge-members, as illustrated in Fig. 7. The drop-wire T consists of a wire loop t curled on itself to form a pigtail or open eye adapted to be hooked over the thread or yarn and having its lower end driven into a hinge-block t. The block Z" is provided with a transverse hole 6 for receiving a pivot pin, and formed with a shoulder Z adapted to act as a detent for engaging the vibrator bar, as hereafter explained. I have shown the drop-wires assembled in units of three on the hingemembers Z which are arranged to be ad justed along the rods S. The hinge-member \Vhen, however, the 9 15 is crescent-shaped with its concave side adapted to fit the contour of the rod S, and formed with a tongue 27* which engages a longitudinal groove 8 in the rod, see Fig. 4. The hinge-members may be slid along the rods to adjust the drop-wires to their proper positions in relation to the threads and are preferably set in staggered arrangement in the several banks, as shown in Fig. 6. Projecting from the hinge-member is a lug t having slots 2? in which the blocks 25 are pivoted on a pin 25 A spring clamp 8 formed of sheet metal extends along the top of the rod S and is secured by the screws 8*. One side .9 of the clamp 8 reaches down over the top of the hinge-members with its edge bearing on the latter to hold them in place against the rod S. The clamp s is formed with a bowed-out portion 8 extending adjacent the edges of the blocks t and serving as a stop to prevent the drop-wires from tilting backward beyond the perpendicular.

Beneath the rods S is the feeler mechanism consisting of a vibratongrid 0 composed of horizontal, longitudinal bars R, R, etc. and cross-members or skids O, 0, etc., see Figs. 41; and 5. A suflicient number of these crossmembers are used to support the bars R throughout the length of the machine and their under sides rest on rolls 0, 0, etc. pivoted on an equal number of brackets P, P. The brackets P are bolted to arms P which have extensions 79 fastened to a horizontal rod p and lugs 79 adapted to rest on the rocker-shaft M. The cross-members O are adapted to slide on the rolls 0 and reciprocatory motion is imparted to the. whole grid 0 by an arm N fast on the shaft M and having a pin a engaging a suitable slot at in one of the cross-members 0, see Fig. 4. The shaft M is rocked by the arm K, moved from the cam I, as previously described, and during the operation of the machine the grid 0 has a slight transverse, reciprocatory motion to move the bars R toward and away from the rods S. The upper faces of the bars It are formed with shoulders a, 7" which normally clear the blocks t of the drop-wires T when the latter are held sub stantially erect by the threads y. When a thread breaks its drop-wire will fall, under influence of gravity, into the position indicated by dotted lines, Fig. at, and in this position the shoulder '1" on the adjacent bar R will engage the detent shoulder t on the block 6'. This engagement acts to arrest the movement of the grid 0 and holds the rocker-shaft M from further motion. When the rocker-shaft M is held from oscillating the arm K will be prevented from downward movement and the member Z of the link L will be restrained from moving downward with the member Z. This causes the member Z to ride out to engage the knock-off lever Q and move the latter to re lease the detent rod H, and the treadle E then rises to shift the belt and stop the machine as previously described.

To prepare the machine for operation the yarns y are drawn from the creel or other supply-holder, not here shown, to the back of the war-per, and passingunder a leaserod u, see Fig. 2, and through a separating comb a are individually hooked into the loops of the drop-wires T. The preferable method of threading up the drop-wires is to lead the yarns through the wires of the separate banks of drops in order. For instance, as shown in Fig. 6, the first yarn will be threaded through the first drop-wire in the left-hand bank; the second yarn through the first wire in the middle bank; and the third yarn through the first Wire in the right-hand bank. The fourth yarn leads through the second wire of the left-hand bank and so on, the whole length of the machine. As the operator works from one edge of the warp to the other he slides the hingemembers into position, one by one as required to take the yarns and they then assume the staggered relation as illustrated in Fig. 6, so that the yarns will be properly spaced. By arranging the dropwires in this manner the threads are more conveniently disposed for oversight of the operator and are more accessible for piecing up. Furthermore, the drop-wires being spaced apart in their bearings along the supporting rods are not hindered, one by another, in action and consequently their operation is more positive.

From the drop-wires the yarns lead through a second comb or reed a and thence pass over a roll a and down to the barrel of the beam B. As the machine is started and the beam rotated the yarns are drawn tautto support the drop-wires in their upright positions, but when a yarn breaks its dropwire will be released to fall and stop the machine as previously described.

It will be seen that my invention is an im provement over stop motion devices in which the drop-wires are directly supported or suspended on the yarns. In such devices the weight of the drop-wire causes friction on the yarn as the latter draws through its eye, and this results in chafing and abrading delicate materials. Furthermore, the dropwires in such arrangements cannot be accurately controlled in relation to the feeler mechanism because variations in the tension of the separate yarns vary the positions, of the drops, and therefore their action is not o sure and positive.

My present improved arrangement gives a firm bearing for each drop'wire and its range of action is regulated within certain limits so that it cannot be displaced or hindered from operating on the feeler motion. Another important improvement resides in the construction of the drop-wires which provides a rigid engaging member or block if for cooperating with the vibrating feeler mechanism. The blocks :6 are held firmly in their bearings in the hinge members against side play and cannot be bent or sprung out of position by the action of the vibrator member. Where drops made entirely of wire or thin sheet metal are used the continuous action of the feeler member will bend and distort their engaging ends so that they are soon rendered ineflicient to act to stop the machine. The arrangement and manner of reciprocating the feeler grid is also an improvement over previous devices in which the vibrator bars are carried on oscillating levers or arms. \Vit-h the present device the feeler bars reciprocate with a straight line movement and are so guided that the path 0]": reciprocation is maintained constantly in proper relation to the drop-wires. This allows adjustment of the wires with a very slight clearance between them and the feeler bars so that their operation on the feeler mechanism is both rapid and accurate and the stop-motion is therefore very sensitive and quick in action. The whole arrangement provides for a strong, durable mecha nism, free from delicate and unstable elements, and adapted to act positively and quickly without danger of hindrance from lint and dust;

It will be understood that I do not claim broadly the use in a warping machine of a stop-motion having drop-wires acting on a feeler-mechanism, but my improvement resides in the novel form and arrangement of such a mechanism as described above, and

What I claim is:

1. In a warping-machine, the combination with the driving means, of stopping mechanism to arrest the operation of said means, knock-off devices to cause the operation of the stopping mechanism, a grid member having transverse bars and supported to reciprocate in ahorizontal plane, means to normally reciprocate said grid, a plurality of drop-wires supported by the yarns in upright positions above the grid member, said drop-wires comprising pivoted hinge-blocks formed with detent shoulders closely adjacent the pivot points of the blocks and adapted to fall to engage the bars of the grid member at rightangles to the horizontal plane of the latter and in line with the pivot points of the blocks, and means to actuate the knock-oft devices when the grid is held from reciprocation by the engagement therewith 01 a drop-wire.

2. In a warping-machine, the combination with the driving means, of stopping mechanism to arrest the operation of said means, knock-oft" devices to cause the operation of the stopping mechanism, a feeler mechanism comprising a grid having horizontal bars, means to normally reciprocate said grid in a horizontal plane during the operation of the machine, a plurality of tilting drop-wires arranged above the grid and normally supported by the yarns in substantially vertical positions, said drop-wires consisting of hinge-blocks with wires projecting from their ends and each block formed with a shoulder adapted to engage the bars of the grid at right angles to the plane of the latter when the drop-wire moves through an arc of less than 60 degrees, and means to cause the operation of the knock-oil devices when the grid is held from movement by engagement therewith of one of the drop-wires.

3. In a stop-motion device for warpingmachines, the combination with a horizontally reciprocating grid, of horizontal rods S, hinge-members t slidable along said rods and provided with slots 6', and drop-wires T having hinge-blocks t pivoted in said slots, said hinge-blocks having wires 15 projecting from their ends and formed with loops for the yarn and detent shoulders 15" formed at an angle to the ends of the hingeblocks and adapted to be carried into a vertical position to engage the grid at rightangles thereto when the drop-wires are tilted from the perpendicular through an arc of less than 60 degrees.

at The combination with a hinge-member (i having a plurality of slots 27, of dropwires T comprising hinge-blocks t pivoted in said slots wit-h wires t projecting from the ends of said blocks and formed with loops at their ends, and detent shoulders 1; formed at an angle to the ends of the hingeblocks and adapted to be carried into a vertical position when the drop-wire is tilted from the perpendicular through an arc of less than (50 degrees.

In a drop-Wire for stop-motion devices, the combination with a block 6, of a wire t formed with a loop at one end for engaging the yarn and having its opposite end driven into the end of the block, and a detent shoulder formed at such an angle to 115 the end of the block that when the drop-wire is tilted from the perpendicular through an arc of less than 60 degrees said shoulder is carried into a vertical position,

In testimony whereof I afiix my signature 120 111 presence of two witnesses.

FE STUS S. RAND.

IVitnesses ARTHUR A. ARMINGTON, GRACE IV. BROWN.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G. 

